Cheap Flights Boston to San Francisco from £68

Flight FAQs

• Which airlines offer the cheapest flights from Boston (BOS) to San Francisco (SFO)?

  Based on Trip.com data, Frontier Airlines offers one-way fares as low as £68 on Cheapest nonstop routes (e.g. BOS to SFO on Sat, Sep 5), while Frontier Airlines offers Cheapest nonstop round-trips from £131 departing on Fri, Aug 21 and returning on Mon, Aug 24.

• Which airlines offer direct flights from Boston to San Francisco?

  At the moment, you can catch a direct flight from Boston to San Francisco with the following airlines, including: Jetblue Airways Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

• How long is the flight from Boston (BOS) to San Francisco (SFO)?

  It takes about 6 hours 51 minutes to fly from Boston (BOS) to San Francisco (SFO).

• When is the best time to book flights from Boston to San Francisco?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Boston to San Francisco is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How many flights are there per week from Boston to San Francisco?

  Based on Trip.com data in the past 4 weeks, there is 108 flight per week flying from Boston to San Francisco. You can check the weekly schedule for popular airlines on this route below: Jetblue Airways: S/M/T/W/T/F/S -- B61833 (10:37)

• How can I find the best deals on flights from Boston to San Francisco?

  To find best deals on flights from Boston to San Francisco, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Sat, Sep 5, with one-way flights priced at just £68.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Delta Air Lines.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for San Francisco travel is around July.
  · Get exclusive promo codes for Trip.com app users.

• When is the best time to book a flight from Boston to San Francisco to get the best price?

  The cheapest months to fly from Boston to San Francisco is October, when demand for travel is lower.

• Which upcoming date is the cheapest for flights from Boston to San Francisco?

  After crunching the numbers on our August flight calendar, it's currently cheapest to fly from Boston to San Francisco on August 19, 2026 with Frontier Airlines, with prices starting at £66.

• Which airports can I fly through when travelling to San Francisco from Boston?

  You can land at any one of the following hubs in San Francisco, with Boston Logan International Airport to San Francisco International Airport (BOS-SFO) is by far the most common option on this route: San Francisco International Airport (SFO).

• What is the time difference between Boston and San Francisco?

  The time difference between San Francisco and Boston is 3h.

• How can I change or cancel my flight ticket from Boston to San Francisco?

  Tickets can only be changed or cancelled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

• What is the average cost of a one-way flight from Boston to San Francisco?

  Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from Boston to San Francisco is £163. Fares vary by travel date, airline and availability.

• What is the average cost of a return flight from Boston to San Francisco?

  Based on Trip.com data for travel in the next 30 days, the average round-trip fare from Boston to San Francisco is £302. The final price depends on the outbound and return dates, airline and fare conditions.

• How do I book flights from Boston to San Francisco on Trip.com?

  Enter Boston and San Francisco, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveller details and complete payment to receive your confirmation.

• Are there budget airlines on the Boston to San Francisco route?

  Jetblue Airways and Frontier Airlinesare the most popular budget airlines flying from Boston to San Francisco. Check baggage, seat and payment fees before comparing the final price.